Terminalogy
Terminal commands handbook
Free · In‑App Purchases
Your simple terminal dictionary
Copied a terminal command from a tutorial, a colleague, or an AI tool and want to understand it before running it? Terminalogy is a local command dictionary that explains command structure, meaning, and potential effects.
Use Terminalogy to:
• Paste a complete command and read explanations of commands, options, arguments, paths, pipes, and redirections
• Search or browse 500 command entries with syntax, examples, common pitfalls, platform differences, and sources
• Understand risks involving deletion, overwriting, permissions, networks, or sensitive information
• Save useful entries and queries for later reading
• Read in English or Simplified Chinese
Command lookup and explanation happen on your device. The dictionary works offline. Terminalogy helps you understand commands; it never executes them or uploads your queries.
Dictionary entries, command explanations, risk guidance, and sources are free. An optional one-time purchase, Terminalogy Pro, adds semantic coloring and token interaction across Mac, iPhone, and iPad using the same Apple Account. No subscription.
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The developer, 夜白 赵, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
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Information
- Seller
- 夜白 赵
- Size
- 16.8 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Terminalogy Pro $1.99
- Copyright
- © 2026 Yebai Zhao